Distributed code-reviews and issues
Store code reviews as git notes with Git Appraise see:
- Spec https://github.com/google/git-appraise
- Plugin https://github.com/google/git-appraise-eclipse
- Discussion https://news.ycombinator.com/item?id=10726113
Apart from that I think there is also room to make issues truly distributed. Fossil already did this http://fossil-scm.org/index.html/doc/trunk/www/bugtheory.wiki
All this is pretty far out though.